RENR5042-02 151 Troubleshooting Section Not OK – The voltage is not 24 ± 3 VDC. Proceed to Test Step 8. B. Remove wire 382-PK from terminal P1-10. Install a jumper wire into terminal P1-10. Test Step 8. Check the Voltage from the Keyswitch to the Ether Relay C. Connect a voltmeter between the −Battery and the other end of the jumper wire. A. Turn the keyswitch to the OFF position. D. Turn the keyswitch to the ON position. B. Remove the wire from terminal R of the keyswitch. E. Select the “Diagnostic Tests” on Cat ET. C. Turn the keyswitch to the ON position. F. Select the “Override Parameters” screen on Cat ET. D. Measure the voltage between terminal B of the keyswitch and engine ground. G.
Activate the ether override. The ECM will activate the override for ten seconds. Observe the voltmeter while the ether injection system is activated. E. Measure the voltage between terminal R of the keyswitch and engine ground. F. Turn the keyswitch to the OFF position. H. Deactivate the ether override. Expected Result: I. Turn the keyswitch to the OFF position. Voltage is present on terminal B and terminal R at the keyswitch. J. Remove the wire jumper and install wire 382-PK into P1-10. Results: Expected Result: OK – Voltage is present on terminal B and terminal R at the keyswitch. The voltage measured 24 ± 3 VDC. Repair:
If voltage is present on terminal R, repair the wire between the keyswitch and the ether relay. Verify that the circuit breaker is not tripped. Return all wiring to the original configuration. Verify that the problem is resolved. Results: OK – The voltage measured 24 ± 3 VDC. Proceed to Test Step 10. Not OK The voltage at the ECM is not 24 ± 3 VDC. STOP. Repair: Temporarily connect a test ECM. Check the operation of the ether injection system when the test ECM is installed. If the problem is resolved with the test ECM, connect the suspect ECM. If the problem returns with the suspect ECM, replace the ECM. Refer to Troubleshooting, “Replacing the ECM”.
Not OK – Voltage is not present on terminal B at the keyswitch. Repair: If voltage is not present on terminal B, repair the wire between the +Battery and the keyswitch. Check the battery’s no-load voltage. Return all wiring to the original configuration. Verify that the problem is resolved. STOP. STOP. Test Step 10. Check for an Open from the ECM to the Coil of the Ether Relay Not OK – Voltage is not present on terminal R at the keyswitch. A. Turn the keyswitch to the OFF position. Repair: If voltage is present on terminal B of the keyswitch but not present on terminal R, replace the keyswitch. Return all wiring to the original configuration. Verify that the problem is resolved. B.
Disconnect the wire on terminal 86 of the ether relay. C. Disconnect ECM connector J1/P1. STOP. D. Measure the resistance of the wire between terminal P1-10 and wire 382-PK at the ether relay. Test Step 9. Check the Output Driver for the Ether Relay E. Connect all wires. A. Turn the keyswitch to the OFF position.